When driving, especially when following someone, and another car gets in between you and the one you are following, blocking your line of sight. It is now when you procede to speed up, tailgating the car, until it is boxed in between you and who you are following, forcing it to change lanes.

A: Dude.. this douche just got in front of me, and I have no idea where I'm going.
B: It's cool man just pull a Puerto Rican Box In!

When driving, especially when following someone, and another car gets in between you and the one you are following, blocking your line of sight. It is now when you procede to speed up, tailgating the car, until it is boxed in between you and who you are following, forcing it to change lanes.

A: Dude.. this douche just got in front of me, and I have no idea where I'm going.
B: It's cool man just pull a Puerto Rican Box In!

When driving, especially when following someone, and another car gets in between you and the one you are following, blocking your line of sight. It is now when you procede to speed up, tailgating the car, until it is boxed in between you and who you are following, forcing it to change lanes.

A: Dude.. this douche just got in front of me, and I have no idea where I'm going.
B: It's cool man just pull a Puerto Rican Box In!